I have a Nolan N104 helmet with the B4 bluetooth module, I also have a Garmin nuvi 760 on my LT. I know it's not the waterproof GPS but it works fine and I'm too cheap to spend big bucks on a zumo. Anyway, I couldn't pair the nuvi with the B4 since the nuvi wasn't designed to do that but, while reading some other threads on here I got the idea to broadcast the nuvi via the FM setting and tuning my B4 to the same FM channel and it works !! This may be old news to some of you but I just figured out how to go wireless between my helmet and the GPS. I can listen to the MP3's on the Garmin and the route instructions stop the music to tell me directions. Whoopee.